喷淋条件对生物滴滤塔去除含H_2S废气的影响  

Influence of spraying time and frequency on degradation of hydrogen sulfide odors by biotrickling filters

作　　者：陈雷[1] 陈益清[2] 李文龙[2] 伍健威[2] 尹娟[2] 孙昕[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]深圳职业技术学院建筑与环境工程学院,深圳518055

出　　处：《环境工程学报》2016年第12期7168-7172,共5页Chinese Journal of Environmental Engineering

基　　金：深圳市科技研发资金(JCYJ20150630114140637);深圳市科技研发资金(JCYJ20160331113033413)

摘　　要：以竹炭为填料,采用高效生物滴滤塔(BTF)中试装置处理污水提升泵站产生的以H2S为主的废气,考察了喷淋时间和喷淋频率对塔内轴向H2S去除率、滤出液中SO2-4浓度和pH、塔内压降的影响。结果表明:当生物滴滤塔系统的空塔停留时间为6.43 s,喷淋时间和喷淋频率分别为1 min·次^(-1)和1次·(60 min)^(-1),BTF对H2S去除效果最好,去除率达99.0%以上,达到《城镇污水处理厂污染物排放标准》(GB 18918^(-2)002)一级厂界排放标准;BTF滤出液中的pH值稳定在2.0~3.0之间,塔内的微生物为嗜酸性硫氧化菌;BTF对H2S的降解符合Michaelis-Menten动力学模型,在适宜喷淋条件下,BTF内的表观半饱和常数(Ks)和最大表观去除速率(Vm)分别为86.8 mg·m-3和22.3 g·(m3·h)^(-1),系统具有较高的抗负荷冲击能力。Hydrogen sulfide（ H2S） was selected as the target compound to study the influence of spraying time and frequency on biological trickling filters（ BTF） packed with bamboo charcoal. The effects of spraying time and frequency on axial H2 S removal in packed column; SO2-4concentration and pH in the filtrate; and the pressure drop between the top and the bottom of the BTF were investigated. The results showed that when empty bed resident time,the spraying time,and spraying frequency were 6. 34 s,1 min·（ time）^（-1）and 1 time·（ 60min）^（-1）,respectively,the H2 S removal efficiency was higher than 99. 0%,which met the first class criteria in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant（ GB 18918-2002）. Microbes in the BTFs were mainly acidophilic sulfur oxidizing bacteria and the pH of the filtrate was 2. 0 to 3. 0. The degradation of H2 S in the BTF followed the Michaelis-Menten kinetic model. The apparent half-saturation constant（ Ks） and the maximum apparent removal rate（ Vm） were 86. 8 mg·m-3and 22. 3 g·（ m3·h）^（-1）,respectively. BTF had a strong ability to resist shock from high concentration loads.

关 键 词：H2S 生物滴滤塔 喷淋时间 喷淋频率 

分 类 号：X701[环境科学与工程—环境工程]